How to use sysctl command

[frederick hannah]

I am installing an application on a Redhat 3.4 server. The install requires a reboot as kernel parms have been changed. I am told the sysctl command dynamically changes kernel parms without a reboot. The procedure requires I edit the /etc/syscntl.conf file then do a "sysctl -p /etc/syscntl.conf" command to effect the changes. I dont see the parms needed in the conf file. Do I have to add them?

[P Muralidhar Kini · Accepted solution]

Hi Frederick,

To find more info on the sysctl command, refer
http://linux.about.com/library/cmd/blcmdl8_sysctl.htm
http://www.ghacks.net/2010/05/13/tune-your-linux-kernel-with-sysctl/

Hope this helps.

Regards,
Murali

[frederick hannah]

Thanks for the help.

[P Muralidhar Kini]

Hi Frederick,

Refer the following link which says how you can thank this forum
http://forums11.itrc.hp.com/service/forums/helptips.do?#28

Regards,
Murali

[Ivan Ferreira]

Short answer: yes, you must add them.

The sysctl -p forces the application of the parameters.

Using sysctl -a you can check all the parameters and their values.

[frederick hannah]

Thanks again guys